CN213845476U

CN213845476U - KU-band high-power microstrip double-section circulator

Info

Publication number: CN213845476U
Application number: CN202022944442.5U
Authority: CN
Inventors: 张东芳; 刘旷希; 唐正龙
Original assignee: Nanjing Guangshun Electronic Technology Research Institute Co ltd
Current assignee: Nanjing Guangshun Electronic Technology Research Institute Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-07-30
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses a KU-band high-power microstrip double-section circulator, which comprises a base, wherein a ferrite substrate, a microstrip circuit and a permanent magnet are sequentially arranged on the base from bottom to top; the microstrip circuit comprises a first central junction, a first branch and a second branch which are connected with the first central junction, a second central junction, a third branch and a fourth branch which are connected with the second central junction, and a fifth branch which is connected with the first central junction and the second central junction; the base is also provided with a radio frequency resistance chip, the radio frequency resistance chip is connected with a branch of the first central junction or the second central junction, and the radio frequency resistance chip is used for receiving microwave signals; the edge part of the first central knot/the second central knot extends outwards to form a fishbone-shaped bulge. The utility model discloses small, light in weight, workable, easy batch production can satisfy the user to good electrical property index and resistant high power's performance requirement, can be used for surface mounting and microcircuit integration.

Description

KU-band high-power microstrip double-section circulator

Technical Field

The utility model belongs to the technical field of microwave communication, specifically a big power microstrip double-section circulator of KU wave band.

Background

With the rapid development of microwave communication, the application of microwave electronic equipment is becoming wide, the performance of the whole machine is also greatly improved, and higher requirements are put forward on the performance index and the power capacity of a ferrite circulator in the microwave electronic equipment; the principle of one-way transmission of circulator is that ferrite gyromagnetic material is used, which generates gyromagnetic characteristics (also called tensor permeability characteristics) under the combined action of external high-frequency wave field and constant DC magnetic field. It is this gyromagnetic property that causes polarization rotation (faraday effect) of electromagnetic waves propagating in ferrite and strong absorption of electromagnetic wave energy (ferromagnetic resonance), and it is this gyromagnetic phenomenon that junction isolators and circulators are made. It has the characteristics of small volume, wide frequency band, small insertion loss and the like, thereby having wide application.

The circulator can realize the unidirectional circulation of microwave power, and the reverse direction is isolation; the embedded circulator can not meet the requirements of a plurality of system patches basically, and the existing patch type circulator can not meet the requirements of a high-frequency range due to a lower working frequency range and small power resistance.

Disclosure of Invention

The utility model aims at the problem that prior art exists, provide a high-power microstrip double-link circulator of KU wave band, its simple structure is applicable to surface mounting and microcircuit integration to satisfy the operating requirement of higher frequency range.

In order to achieve the above object, the utility model adopts the following technical scheme:

a KU-band high-power microstrip double-section circulator comprises a base, wherein a ferrite substrate is fixedly welded on the base, a microstrip circuit is arranged above the ferrite substrate, and a permanent magnet is arranged above the microstrip circuit; the microstrip circuit comprises a first central junction, a first branch and a second branch which are connected with the first central junction, a second central junction, a third branch and a fourth branch which are connected with the second central junction, and a fifth branch which is connected with the first central junction and the second central junction; a plurality of first welding points are arranged on two sides of the first branch and are respectively connected with the first branch; a plurality of second welding points are arranged on two sides of the fourth branch and are respectively connected with the fourth branch; a plurality of third welding points are arranged on two sides of the fifth branch, and are respectively connected with the fifth branch; the utility model discloses a each branch road both sides on microstrip circuit set up a plurality of solder joints, can weld the solder joint of each branch road according to the actual demand when using to the realization improves the effect of electric property. The number of the permanent magnets is two, and the two permanent magnets are respectively arranged above the first central junction and the second central junction; the base is also provided with a radio frequency resistance chip, the radio frequency resistance chip is connected with a branch of the first central junction or the second central junction, and the radio frequency resistance chip is used for receiving microwave signals; the edge part of the first central knot/the second central knot extends outwards to form a fishbone-shaped bulge.

The utility model discloses in, the vertical magnetization ferrite substrate of permanent magnet, ferrite substrate edge magnetization is even, and the base is good to because the base matches with the thermal expansion coefficient of ferrite substrate, can protect the ferrite substrate when the welding, reduced because the welding and the risk that leads to the ferrite substrate fracture, improved the reliability of product.

Specifically, the microstrip circuit is electroplated on the upper surface of the ferrite substrate by a photoetching technology; the upper surface of the ferrite substrate is polished, oil stain and impurity particles are removed by a chemical method, and the surface is activated and adsorbed by a physical method, so that the adhesive force of a circuit film layer is ensured.

Specifically, the radio frequency resistance chip is welded on the base through solder paste.

Specifically, the base is the magnetic metal material, the permanent magnet is samarium cobalt permanent magnet, and magnetism is stable lasting, and the difficult decay of magnetic field intensity of formation.

In particular, the central axis of the permanent magnet coincides with the central axis of the first/second central junction.

The micro-strip double-section circulator is suitable for the surface mounting technology and is connected with a microwave circuit through the gold wire bonding technology.

Compared with the prior art, the beneficial effects of the utility model are that: (1) the utility model discloses a set up a plurality of solder joints in each branch road both sides in microstrip circuit, can utilize soldering tin to weld the solder joint of each branch road according to actual demand when using to connect each branch road, improve the effect of electric property; (2) the utility model discloses a circulator is small, light in weight, workable, easy batch production, for conventional two-section circulator, the utility model discloses more can satisfy the user to good electrical property index and resistant high power's performance requirement, can be used for surface mounting and microcircuit integration.

Drawings

Fig. 1 is a schematic view of an assembly structure of a KU-band high-power microstrip double-section circulator in an embodiment of the present invention;

FIG. 2 is an exploded schematic view of a KU-band high-power microstrip double-section circulator in an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a microstrip circuit according to an embodiment of the present invention;

in the figure: 1. a base; 2. a ferrite substrate; 3. a microstrip circuit; 4. a permanent magnet; 5. a first central junction; 6. a first branch; 7. a second branch circuit; 8. a second central junction; 9. a third branch; 10. a fourth branch; 11. a fifth branch; 12. a first solder joint; 13. a second solder joint; 14. a third solder joint; 15. and the radio frequency resistance chip.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 3, the present embodiment provides a KU-band high-power microstrip double-section circulator, including a base 1, a ferrite substrate 2 welded and fixed on the base 1, a microstrip circuit 3 disposed above the ferrite substrate 2, and a permanent magnet 4 disposed above the microstrip circuit 3; the microstrip circuit 3 comprises a first central junction 5, a first branch 6 and a second branch 7 which are connected with the first central junction 5, a second central junction 8, a third branch 9 and a fourth branch 10 which are connected with the second central junction 8, and a fifth branch 11 which is connected with the first central junction 5 and the second central junction 8; two sides of the first branch 6 are provided with 7 first welding points 12 (one side is provided with 1, the other side is provided with 6, the specific number and arrangement mode can be set according to actual requirements), and the 7 first welding points 12 are respectively connected with the first branch 6; two sides of the fourth branch 10 are provided with 7 second welding spots 13 (one side is provided with 1, the other side is provided with 6, the specific number and arrangement mode can be set according to actual requirements), and the 7 second welding spots 13 are respectively connected with the fourth branch 10; two sides of the fifth branch 11 are respectively provided with 1 third welding point 14 (the specific number and arrangement mode can be set according to actual requirements), and 2 third welding points 14 are respectively connected with the fifth branch 11; in the embodiment, the two sides of each branch on the microstrip circuit 3 are provided with the plurality of welding spots, and the welding spots of each branch can be welded according to actual requirements when the microstrip circuit is used, so that the effect of improving the electrical performance is realized. The number of the permanent magnets 4 is two, the two permanent magnets 4 are respectively arranged above the first central junction 5 and the second central junction 8, and the central axis of each permanent magnet 4 is superposed with the central axis of the first central junction 5/the central axis of the second central junction 8; the base 1 is further provided with a radio frequency resistance chip 15, the radio frequency resistance chip 15 is welded on the base 1 through soldering paste, the radio frequency resistance chip 15 is connected with a branch of the second central junction 8, and the radio frequency resistance chip 15 is used for receiving microwave signals; the edge part of the first central knot 5/the second central knot 8 extends outwards to form a fishbone-shaped bulge. The fishbone-shaped bulges comprise 12 bulges which are divided into 3 groups, each group comprises 4 bulges, and the 3 groups of bulges are uniformly arranged along the edge of the central knot.

In the embodiment, the permanent magnet 4 magnetizes the ferrite substrate 2 longitudinally, the edge of the ferrite substrate 2 is uniformly magnetized, the base is good, and the base 1 and the ferrite substrate 2 have the same thermal expansion coefficient, so that the ferrite substrate 2 can be protected during welding, the risk of cracking of the ferrite substrate 2 caused by welding is reduced, and the reliability of the product is improved.

Specifically, the microstrip circuit 3 is electroplated on the upper surface of the ferrite substrate 2 by a photoetching technology; the upper surface of the ferrite substrate 2 is polished, degreasing and impurity particles are removed by a chemical method, and the surface is activated and adsorbed by a physical method, so that the adhesion of a circuit film layer is ensured.

Specifically, base 1 is the magnetic metal material, permanent magnet 4 is samarium cobalt permanent magnet 4, and magnetism is stable lasting, and the difficult decay of magnetic field intensity of formation.

In this embodiment, the main technical indexes of the circulator are shown in the following table:

as can be seen from the above table, the circulator of the present embodiment can meet the working requirement in a higher frequency range, and has better high power resistance and excellent electrical performance index.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A KU-band high-power microstrip double-section circulator comprises a base, wherein a ferrite substrate is fixedly welded on the base, a microstrip circuit is arranged above the ferrite substrate, and a permanent magnet is arranged above the microstrip circuit; the microstrip circuit is characterized by comprising a first central junction, a first branch and a second branch which are connected with the first central junction, a second central junction, a third branch and a fourth branch which are connected with the second central junction, and a fifth branch which is connected with the first central junction and the second central junction; a plurality of first welding points are arranged on two sides of the first branch and are respectively connected with the first branch; a plurality of second welding points are arranged on two sides of the fourth branch and are respectively connected with the fourth branch; a plurality of third welding points are arranged on two sides of the fifth branch, and are respectively connected with the fifth branch; the number of the permanent magnets is two, and the two permanent magnets are respectively arranged above the first central junction and the second central junction; the base is also provided with a radio frequency resistance chip, and the radio frequency resistance chip is connected with a branch of the first central junction or the second central junction; the edge part of the first central knot/the second central knot extends outwards to form a fishbone-shaped bulge.

2. The KU band high power microstrip double-section circulator of claim 1 wherein said microstrip circuit is electroplated on said ferrite substrate upper surface by photolithography.

3. The KU band high power microstrip double-section circulator as claimed in claim 1, wherein the radio frequency resistor chip is soldered on the base by solder paste.

4. The KU band high-power microstrip double-section circulator of claim 1, wherein the permanent magnet is a samarium cobalt permanent magnet.

5. The KU band high power microstrip double-section circulator of claim 1 wherein said base is made of magnetic metal.

6. The KU-band high-power microstrip double-section circulator as claimed in claim 1, wherein the central axis of the permanent magnet coincides with the central axis of the first/second central junctions.